The system ran very close to the edge, leaving no room for error,” Jim Robb, president and CEO of the North American Electric Reliability Corp., told a House subcommittee.

Snowfall measurements were extremely challenging as wind gusts to 60 mph resulted in blowing and drifting snow, with drifts of several feet reported.

Rain fell on and off throughout the day in the tourist district, with pockets of heavy downpours.

As rescues continue, officials are bracing for more from the Kona-low storm. “Models were not as keen on definitive features, ...